Pith Number

pith:FC3BOMK6

pith:2012:FC3BOMK6DOWCD3ROXIUGWJ3D2H

not attested not anchored not stored refs pending

Recklessly Approximate Sparse Coding

Misha Denil, Nando de Freitas

arxiv:1208.0959 v2 · 2012-08-04 · cs.LG · cs.CV · stat.ML

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:37:08.308946Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28b617315e1bac21ee2eba286b2763d1c9b811c79a88822487fe433aaad5ed23

Aliases

arxiv: 1208.0959 · arxiv_version: 1208.0959v2 · doi: 10.48550/arxiv.1208.0959 · pith_short_12: FC3BOMK6DOWC · pith_short_16: FC3BOMK6DOWCD3RO · pith_short_8: FC3BOMK6

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/FC3BOMK6DOWCD3ROXIUGWJ3D2H \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 28b617315e1bac21ee2eba286b2763d1c9b811c79a88822487fe433aaad5ed23

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa1a274284630e7b72c867129f3e761b8debe7cbfd36bf2467de37a3912d9f55",
    "cross_cats_sorted": [
      "cs.CV",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2012-08-04T21:48:52Z",
    "title_canon_sha256": "2b0946012ffc5d32861ae62e39d1d8b718abdd1df42dd5c7346aa2ff2c3946ca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.0959",
    "kind": "arxiv",
    "version": 2
  }
}